Average performance of TAFs, by issuing office April 2011
  VFR Category Above IFR Alternate Category Below IFR Alternate Category
EC Weather Centre Location Correct Forecasts (hours) Total Forecasts (hours) VFR Reliability Index Correct Forecasts (hours) Total Forecasts (hours) Alternate Reliability Index False Alarms (hours) Total Forecasts (hours) Below Alternate False Alarm Ratio
Montreal 48159 53761 90% 53318 58235 92% 3175 9219 34%
Edmonton 64397 68324 94% 66273 69577 95% 2036 4194 49%
National 112556 122085 92% 119591 127812 94% 5211 13414 39%